Concept:
Human geography is an inherently interdisciplinary spatial discipline that interfaces continuously with several sister social science disciplines.
Each sub-field of human geography borrows theoretical constructs, behavioral insights, and empirical analytical methods from a corresponding sister academic discipline.
Step 1: Matching Sub-fields with Sister Disciplines:
1. Behavioral Geography (A): Examines how human individuals perceive, cognitive-map, and respond to spatial environments. It interfaces directly with Psychology (II).
2. Medical Geography (B): Investigates the spatial patterns of disease outbreaks, health distribution, and healthcare access. It interfaces directly with Epidemiology (I).
3. Electoral Geography (C): Studies the spatial aspects of voting behavior, constituency delimitations, and electoral outcomes. It interfaces directly with Psephology (III), the science of elections and voting.
4. Geography of Leisure (D): Analyzes spatial patterns of tourism, recreation, and cultural leisure activities. It interfaces directly with Sociology (IV).
Step 2: Consolidating the Pairs:
The matching pairs are:
A $\rightarrow$ II, B $\rightarrow$ I, C $\rightarrow$ III, D $\rightarrow$ IV.
This corresponds to Option (B).
Final Answer:
Therefore, the correct match is A-II, B-I, C-III, D-IV.